TROPHON. 443 



duced beyond the operculum. The denticles and angles 

 of the axile teeth are acute and produced. 



This pretty and distinct species was first noticed by 

 Dr. Johnston of Berwick, who found it in deep water in 

 Berwick Bay. It is an inhabitant mainly of our northern 

 seas, inhabiting various depths of water, from eighteen to 

 sixty fathoms. We have taken it alive in the Hebrides. 

 It has been dredged also in Loch Fyne, and elsewhere 

 on the west coast of Scotland by Mr. Barlee. Mr. Jef- 

 freys has a specimen procured off Cork by Mr. Hum- 

 phreys. In sixty fathoms water off the Northumberland 

 coast (Howse). 



It ranges to the Arctic seas, but does not extend south 

 of Britain. 



Triton elegans, Thompson. 



Triton dvijans, Thompson, Annals Nat. Hist. vol. xv. p. 317, pi. 19, f. 1. 



Oval-oblong, subventricose near the middle, acuminately 

 tapering above to a very fine point, moderately attenuated 

 below ; strong, pure white, with two indistinct narrow 

 tawny bands upon the body-whorl, one almost in a line 

 with the top of the aperture, the other halfway between it 

 and the suture. Exterior roughened throughout by coarse 

 and rather distant longitudinal ribs (not continuous from 

 whorl to whorl), that are subnodosely decussated by more 

 closely disposed, yet not crowded, revolving costellre ; in- 

 tervals of the former, of which there are from ten to twelve 

 on the two principal volutions, broader than the ribs them- 

 selves ; interstices of the latter, of which we counted five 

 or six on the penult turn, about equal to the costellre, and 

 divided on the body by an extremely fine parallel thread. 

 A single strong varix, that is somewhat removed from the 



